Noob question...

If you buy the unactivated game, the restriction should go away. You'll be able to pass the SGTools check.

Yeah, if you acquire a copy of the game then you'll be good. If you don't mind me asking, what game is it? I ask because depending on its rarity, you might be able to trade for it rather than shelling out for a new copy.

Looks like you can buy the game for $2 from the trade section. If you wanted to.

edit: I guess rules actually don't want trade links outside of the trade forums. Search if you want!
well, it says 'trades' but links to trade forums probably will make people upset

just one thing, the key you got was bad or you did something else with it?
because if it's the first case, it's not your responsibility and you can mark it as not received (key didn't work or region locked).

ok, so the key you got was region-locked? you shouldn't even mark it as received.

give the key back to the giveaway creator and mark as not received.
if you later get a working key from him, you can change the feedback. or just let the guy delete the giveaway.

I remember your story: while the fault was all on the giveaway creator, who knowingly made a giveaway for a game with an absurd region lock without even warning about it, you should've been more keen to avoid that happening (you should've either marked as not received, or allowed him to delete the giveaway).

Now, if you obtain a copy of that game (it should be €3.99 during the summer sale, or you can try trading for it), you'll be able to enter SGTools giveaways.

A reminder for the future: always check if games have region locks, and if they do, check the giveaway creator's country.

Wow you are so lucky winning all this good games
anyway you can buy the game and your account will be fine
https://www.steamgifts.com/trades/search?want=killer+is+dead click and you will find people have the game and want to trade

Next time, maybe you should send ticket to support to inform you got region locked key and the creator don't state it on the description.

just remember to sync with steam once it's in your steam library and you should be all good